$ git clone -n https://src.fedoraproject.org/rpms/perl-RPM2.git /var/lib/mock/f45-build-26001-614/root/chroot_tmpdir/scmroot/perl-RPM2
Cloning into '/var/lib/mock/f45-build-26001-614/root/chroot_tmpdir/scmroot/perl-RPM2'...
$ git fetch origin 2e5fe86b178154873d5bf264a6e854dca80756f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-RPM2
 * [new ref]         2e5fe86b178154873d5bf264a6e854dca80756f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2e5fe86 Perl 5.44 rebuild